GHSA-M259-67HC-P7V5

Vulnerability from github – Published: 2026-08-07 21:30 – Updated: 2026-08-07 21:30
VLAI
Details

A security vulnerability has been detected in HKUDS nanobot up to 0.2.1. Impacted is the function ExecTool._guard_command/ExecTool._spawn of the file nanobot/agent/tools/shell.py of the component Shell Allowlist Handler. Such manipulation leads to os command injection. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 0.3.0 is recommended to address this issue. The name of the patch is 4562. It is advisable to upgrade the affected component. Multiple issues were reported to the project. They reacted with a high level of professionalism and kindness: "These five reports are variants of the same root cause: validation of shell commands containing multiple segments, wrappers, comments, or chained commands. The issue was fixed by validating every executable shell segment against the configured allowlist".

Severity
6.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1 (Low)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
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{
  "affected": [],
  "aliases": [
    "CVE-2026-19243"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-07T20:16:50Z",
    "severity": "LOW"
  },
  "details": "A security vulnerability has been detected in HKUDS nanobot up to 0.2.1. Impacted is the function ExecTool._guard_command/ExecTool._spawn of the file nanobot/agent/tools/shell.py of the component Shell Allowlist Handler. Such manipulation leads to os command injection. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 0.3.0 is recommended to address this issue. The name of the patch is 4562. It is advisable to upgrade the affected component. Multiple issues were reported to the project. They reacted with a high level of professionalism and kindness: \"These five reports are variants of the same root cause: validation of shell commands containing multiple segments, wrappers, comments, or chained commands. The issue was fixed by validating every executable shell segment against the configured allowlist\".",
  "id": "GHSA-m259-67hc-p7v5",
  "modified": "2026-08-07T21:30:38Z",
  "published": "2026-08-07T21:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19243"
    },
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/nanobot/issues/4521"
    },
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/nanobot/pull/4562"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/YLChen-007/8fcbf8e49e7be568e1a92e9e0414fdba"
    },
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/nanobot"
    },
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/nanobot/releases/tag/v0.3.0"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-19243"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/865112"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/865114"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/865115"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/865119"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/865121"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/386997"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/386997/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.